US4683581A - Apparatus for X-ray photography of the area of the dentition and of the jaws - Google Patents

Apparatus for X-ray photography of the area of the dentition and of the jaws Download PDF

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Publication number
US4683581A
US4683581A US06/696,776 US69677685A US4683581A US 4683581 A US4683581 A US 4683581A US 69677685 A US69677685 A US 69677685A US 4683581 A US4683581 A US 4683581A
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US
United States
Prior art keywords
support arm
ray
relation
bearing part
film
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Expired - Lifetime
Application number
US06/696,776
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English (en)
Inventor
Erkki Tammisalo
Heikki Kanerva
Jaakko Aarnio
Markku Wederhorn
Kai Laner
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Instrumentarium Oyj
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Orion Yhtyma Oy
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Application filed by Orion Yhtyma Oy filed Critical Orion Yhtyma Oy
Assigned to ORION-YHTYMA reassignment ORION-YHTYMA ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: AARNIO, JAAKKO, KANERVA, HEIKKI, LANER, KAI, TAMMISALO, ERKKI, WEDERHORN, MARKKU
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Assigned to INSTRUMENTARIUM CORPORATION reassignment INSTRUMENTARIUM CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ORION-YHTYMA OYJ
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/50—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications
    • A61B6/51—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications for dentistry

Definitions

  • the present invention relates to an apparatus for X-ray photography of the area of the dentition and of the jaws, and of the type comprising a stationary frame part, a bearing part which is movably mounted to the frame part and preferably performs a linear movement, and a support arm which is rotatably attached using bearings to the bearing part and has at one end a source of X-radiation and at the opposite end a movable X-ray film, the movements of the bearing part, the support arm and the film being synchronized in such a way that a sharp image of only an area of the desired shape is obtained on the film, for example the area of the patient's dental arch.
  • an object of the present invention is to provide a general panoramic apparatus intended for X-ray photography of the dentition and the jaws, wherein the enlargement can be easily varied within the desired limits and the area of which a sharp image is obtained can be easily selected without shifting the patient.
  • the support arm is connected to the bearing part by mediation of structural parts which have been provided with guides extending in the longitudinal direction of the support arm, and with transfer means, in such a way that the support arm, and at the same time the source of radiation and the X-ray film, can be moved in relation to the rotational axis of the support arm and in a direction parallel to the plane of the X-ray beam.
  • transfer means in such a way that the support arm, and at the same time the source of radiation and the X-ray film, can be moved in relation to the rotational axis of the support arm and in a direction parallel to the plane of the X-ray beam.
  • the support arm can, furthermore, be tilted in such a way that the straight line connecting the source of radiation and the film will no longer be on a horizontal plane.
  • the support arm can, furthermore, be tilted in such a way that the straight line connecting the source of radiation and the film will no longer be on a horizontal plane.
  • FIG. 1 depicts a perspective representation of one embodiment of the X-ray photography apparatus according to the invention, in part exploded for the sake of illustration, and
  • FIG. 2 depicts in a corresponding manner an alternative embodiment.
  • the X-ray apparatus includes a stationary frame, which is indicated in the drawing by reference numeral 1 and which, in addition to the part shown in the drawing, normally includes a vertical pole attached to it and a stand resting on the floor.
  • the protruding part 1 shown in the drawing is, of course, in practice encased, but for the sake of illustration this casing is not shown.
  • a bearing part 2 which is capable of moving in the frame linearly along a horizontal plane and supported by rails 3.
  • the movement is produced by a stepping motor 4, the shaft of which is a screw 5 which works in conjunction with the bearing part 2.
  • a sleeve 6 which is rotated by another stepping motor 7 by transmission of a cogged belt 8.
  • a casing-like part 9 which thus rotates together with the sleeve 6 and to which there is further attached with bearings in a manner depicted below a support arm 10, which constitutes an essential part of the photography apparatus.
  • a movable X-ray film 11 At one end of the support arm there is a movable X-ray film 11 and at its opposite end a source 12 of X-radiation with means for limiting the beam.
  • the support arm 10 performs at least a partial rotational movement, the fulcrum moving at the same time linearly together with the bearing part 2, and the head of the patient being located between the source 12 of X-radiation and the X-ray film 11.
  • This arrangement is already so familiar to experts in the art that it is not described here in greater detail. It is also evident that, as an alternative to the linear shift of the bearing part 2, it is possible to shift the patient, i.e. the chair of the patient, correspondingly during the rotational movement of the support arm.
  • curved guides 13, which work in conjunction with corresponding curved guides 14 in the control part 16.
  • a strip 24 At the lower edge of the side piece 23 of the control part 16 there is additionally a strip 24, and the flat middle section 22 of the support arm 10 can move supported by this strip.
  • the last-mentioned movement in a direction parallel to the X-ray beam is produced by a stepping motor 19, which rotates a transverse shaft and its cogwheels 20, the cogwheels for their part working in conjunction with cogged bars 21 in the middle section 22.
  • stepping motor 19 which rotates a transverse shaft and its cogwheels 20, the cogwheels for their part working in conjunction with cogged bars 21 in the middle section 22.
  • friction wheels Respectively, of course, it is possible to use friction wheels.
  • the control part 16 for its part is moved by a screw 18 which grips it in an articulated way and serves as the shaft of the stepping motor 17, which for its part is articulated by means of a transverse shaft 15 to the casing part 9.
  • the motor 17 thus affects the mutual shifting of the guides 13 and 14, and since the guides are curved, the transfer motor 17 of the control part 16 has been suspended in an articulated way.
  • the image enlargement coefficient can be changed by moving the support arm 10 in a direction parallel to the beam, in other words by means of the motor 19. By rotating the support arm 10 180° it is thus possible to allow the source of radiation to travel around either the neck or the face of the patient, and a suitable enlargement coefficient can be produced without shifting the patient.
  • the support arm when somewhat slanted teeth are being photographed, it may be appropriate to tilt the support arm by means of the motor 17 and the curved rails 13, 14, at which time it is, of course, advisable also to limit the X-ray beam in the vertical direction in such a way that the teeth of only the upper jaw or the lower jaw are photographed.
  • the tilting does not substantially alter the distance of the source of radiation, respectively the film, from the patient, which would occur if the tilting were produced by means of a horizontal transverse shaft.
  • FIG. 2 One alternative arrangement is shown in FIG. 2.
  • the linear transfer i.e. the transfer in a direction parallel to the plane of the X-ray beam, is produced by means of a plate 26 attached to the sleeve 6, the edges of the plate being guided by rails 28 on the sides of the casing-like part 27.
  • the transfer is effected by means of a motor 29, which is secured to the lower surface of the plate 26.
  • At least the middle section of the support arm 10 is curved in such a way that the center point of the curve, i.e. the tilting axis, is again located approximately at the level of the head of the patient 25.
  • Rollers 30, 31, attached by means of bearings inside the casing 27, work in conjunction with the arch 10, the rollers working against the side, upper and lower surfaces of the arch (the last-mentioned not shown), directing the arch along its own curved line.
  • the transfer movement is produced by means of a spindle motor 32 attached turnably to the casing 27 by means of a shaft 33, the threaded shaft 34 of the motor engaging in a mating piece 35 attached turnably to the side of the arch.
  • the film must also be moved synchronically with the rotational movement of the support arm.
  • the shifting of the film is also produced preferably by means of a stepping motor, although this arrangement is not shown in the drawing.
  • stepping motors are preferably controlled electronically in a manner known per se, especially by means of a programmed or a programmable microprocessor, in which case no mechanical means such as cams or the like are required for mutual synchronization of the movements of the different parts.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Medical Informatics (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Biomedical Technology (AREA)
  • Biophysics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Dentistry (AREA)
  • Pathology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
US06/696,776 1984-02-01 1985-01-31 Apparatus for X-ray photography of the area of the dentition and of the jaws Expired - Lifetime US4683581A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI840412A FI88671C (fi) 1984-02-01 1984-02-01 Roentgenfotograferingsanordning foer taenderna och hakorna
FI840412 1984-02-01

Publications (1)

Publication Number Publication Date
US4683581A true US4683581A (en) 1987-07-28

Family

ID=8518469

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/696,776 Expired - Lifetime US4683581A (en) 1984-02-01 1985-01-31 Apparatus for X-ray photography of the area of the dentition and of the jaws

Country Status (9)

Country Link
US (1) US4683581A (fi)
EP (1) EP0155072B1 (fi)
JP (1) JPS60179045A (fi)
AU (1) AU570766B2 (fi)
CA (1) CA1252328A (fi)
DE (1) DE3580500D1 (fi)
ES (1) ES539981A0 (fi)
FI (1) FI88671C (fi)
SU (1) SU1424721A3 (fi)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4811372A (en) * 1985-12-20 1989-03-07 Siemens Aktiengesellschaft Dental X-ray diagnostic installation for producing panoramic tomograms of the jaw of a patient
US4819254A (en) * 1986-01-23 1989-04-04 Radiante Oy Method of and apparatus for recording and reproducing image information in panoramic x-ray photography
WO2000000087A1 (en) * 1998-06-26 2000-01-06 Planmeca Oy Method, apparatus and their use in tomographic imaging
WO2002076296A1 (en) * 2001-03-27 2002-10-03 Planmeca Oy Method and arrangement for implementing the movements of the functional elements of x-ray imaging equipment
US7197109B2 (en) 2002-07-25 2007-03-27 Gendex Corporation Real-time digital x-ray imaging apparatus
US7319736B2 (en) 2001-07-25 2008-01-15 Gendex Corporation Real-time digital x-ray imaging apparatus

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6122842A (ja) * 1984-07-10 1986-01-31 朝日レントゲン工業株式会社 歯科用全顎ｘ線撮影装置
CH666803A5 (de) * 1985-01-25 1988-08-31 Hanspeter Dr Med Dent Delnon Geraet zur aufnahme von roentgen-schichtbildern.
FI79459C (fi) * 1986-02-04 1990-01-10 Orion Yhtymae Oy Foerfarande och anlaeggning foer roentgenfotografering av omraodet foer taenderna, kaekarna och skallen.
FI98488C (fi) * 1993-01-08 1997-07-10 Orion Yhtymae Oy Menetelmä vakiosuurennuksen toteuttamiseksi panoraamaröntgenkuvauksessa
AU2001217445A1 (en) * 2000-08-29 2002-03-13 Akexei Vladimirovich Behterev Radiographic scanning device
JP2004136027A (ja) * 2002-10-21 2004-05-13 Univ Nihon 画像処理装置
JP5206822B2 (ja) 2010-07-09 2013-06-12 株式会社デンソー 半導体装置
JP6666283B2 (ja) 2017-02-23 2020-03-13 株式会社モリタ製作所 Ｘ線断層撮影装置およびｘ線断層撮影方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3670163A (en) * 1969-07-16 1972-06-13 Radiologie Cie Gle Radiological examination apparatus
US3803418A (en) * 1971-07-08 1974-04-09 Siemens Ag X-ray device for investigation of skulls
US4241254A (en) * 1976-12-10 1980-12-23 Syntex (U.S.A.) Inc. X-Ray source moving mechanism suitable for panoramic radiography
US4541293A (en) * 1981-06-23 1985-09-17 Thomson Csf Load-bearing telescopic slide assembly and X-ray installation equipped therewith

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2595260A (en) * 1949-02-05 1952-05-06 F R Machine Works Multiplane X-ray apparatus
JPS52103988A (en) * 1976-02-25 1977-08-31 Morita Mfg Method and device for taking curved sectional plane of xxray
DE2758191A1 (de) * 1977-12-27 1979-06-28 Siemens Ag Zahnaerztliche roentgendiagnostikeinrichtung
JPS551053A (en) * 1978-06-19 1980-01-07 Daido Steel Co Ltd Electrode gripper for arc furnace
DE3007935A1 (de) * 1980-03-01 1981-09-17 Philips Patentverwaltung Gmbh, 2000 Hamburg Dental-tomographiegeraet
US4373361A (en) * 1981-04-13 1983-02-15 Thorneburg James L Ski sock with integrally knit thickened fabric areas
US4534048A (en) * 1983-01-03 1985-08-06 Pennwalt Corporation Methods of increasing anterior layer thickness of continuous dental images obtained through rotational panoramic radiography

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3670163A (en) * 1969-07-16 1972-06-13 Radiologie Cie Gle Radiological examination apparatus
US3803418A (en) * 1971-07-08 1974-04-09 Siemens Ag X-ray device for investigation of skulls
US4241254A (en) * 1976-12-10 1980-12-23 Syntex (U.S.A.) Inc. X-Ray source moving mechanism suitable for panoramic radiography
US4541293A (en) * 1981-06-23 1985-09-17 Thomson Csf Load-bearing telescopic slide assembly and X-ray installation equipped therewith

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4811372A (en) * 1985-12-20 1989-03-07 Siemens Aktiengesellschaft Dental X-ray diagnostic installation for producing panoramic tomograms of the jaw of a patient
US4819254A (en) * 1986-01-23 1989-04-04 Radiante Oy Method of and apparatus for recording and reproducing image information in panoramic x-ray photography
WO2000000087A1 (en) * 1998-06-26 2000-01-06 Planmeca Oy Method, apparatus and their use in tomographic imaging
US6452997B1 (en) 1998-06-26 2002-09-17 Planmeca Oy Method for use in tomographic imaging
WO2002076296A1 (en) * 2001-03-27 2002-10-03 Planmeca Oy Method and arrangement for implementing the movements of the functional elements of x-ray imaging equipment
US20040076263A1 (en) * 2001-03-27 2004-04-22 Christian De Godzinsky Method and arrangement for implementing the movements of the functional elements of x-ray imaging equipment
US7409036B2 (en) 2001-03-27 2008-08-05 Planmeca Oy Method and arrangement for implementing the movements of the functional elements of x-ray imaging equipment
US7319736B2 (en) 2001-07-25 2008-01-15 Gendex Corporation Real-time digital x-ray imaging apparatus
US7197109B2 (en) 2002-07-25 2007-03-27 Gendex Corporation Real-time digital x-ray imaging apparatus
US7672425B2 (en) 2002-07-25 2010-03-02 Gendex Corp. Real-time digital X-ray imaging apparatus

Also Published As

Publication number Publication date
AU3800085A (en) 1985-08-08
JPS60179045A (ja) 1985-09-12
AU570766B2 (en) 1988-03-24
EP0155072B1 (en) 1990-11-14
JPH0554341B2 (fi) 1993-08-12
ES8601672A1 (es) 1985-11-16
FI840412A (fi) 1985-08-02
CA1252328A (en) 1989-04-11
SU1424721A3 (ru) 1988-09-15
ES539981A0 (es) 1985-11-16
FI88671C (fi) 1993-06-28
FI840412A0 (fi) 1984-02-01
EP0155072A3 (en) 1987-05-20
FI88671B (fi) 1993-03-15
DE3580500D1 (de) 1990-12-20
EP0155072A2 (en) 1985-09-18

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